/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 *    InstanceTable.java
 *    Copyright (C) 1999 University of Waikato, Hamilton, New Zealand
 *
 */

package weka.gui.streams;

import weka.core.Instance;
import weka.core.Instances;

import java.awt.BorderLayout;

import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;

/**
 * A bean that takes a stream of instances and displays in a table.
 * 
 * @author Len Trigg (trigg@cs.waikato.ac.nz)
 * @version $Revision: 7059 $
 */
public class InstanceTable extends JPanel implements InstanceListener {

	/** for serialization */
	private static final long serialVersionUID = -2462533698100834803L;

	private JTable m_InstanceTable;
	private boolean m_Debug;
	private boolean m_Clear;
	private String m_UpdateString;
	private Instances m_Instances;

	public void inputFormat(Instances instanceInfo) {

		if (m_Debug) {
			System.err.println(Messages.getInstance().getString(
					"InstanceTable_InputFormat_Error_Text")
					+ instanceInfo.toString());
		}
		m_Instances = instanceInfo;
	}

	public void input(Instance instance) throws Exception {

		if (m_Debug) {
			System.err.println(Messages.getInstance().getString(
					"InstanceTable_Input_Error_Text_First")
					+ instance
					+ Messages.getInstance().getString(
							"InstanceTable_Input_Error_Text_Second"));
		}
		m_Instances.add(instance);
	}

	public void batchFinished() {

		TableModel newModel = new AbstractTableModel() {
			private static final long serialVersionUID = 5447106383000555291L;

			public String getColumnName(int col) {
				return m_Instances.attribute(col).name();
			}

			public Class getColumnClass(int col) {
				return "".getClass();
			}

			public int getColumnCount() {
				return m_Instances.numAttributes();
			}

			public int getRowCount() {
				return m_Instances.numInstances();
			}

			public Object getValueAt(int row, int col) {
				return new String(m_Instances.instance(row).toString(col));
			}
		};
		m_InstanceTable.setModel(newModel);
		if (m_Debug) {
			System.err.println(Messages.getInstance().getString(
					"InstanceTable_BatchFinished_Error_Text"));
		}
	}

	public InstanceTable() {

		setLayout(new BorderLayout());
		m_InstanceTable = new JTable();
		add("Center", new JScrollPane(m_InstanceTable));
	}

	public void setDebug(boolean debug) {

		m_Debug = debug;
	}

	public boolean getDebug() {

		return m_Debug;
	}

	public void instanceProduced(InstanceEvent e) {

		Object source = e.getSource();
		if (source instanceof InstanceProducer) {
			try {
				InstanceProducer a = (InstanceProducer) source;
				switch (e.getID()) {
				case InstanceEvent.FORMAT_AVAILABLE:
					inputFormat(a.outputFormat());
					break;
				case InstanceEvent.INSTANCE_AVAILABLE:
					input(a.outputPeek());
					break;
				case InstanceEvent.BATCH_FINISHED:
					batchFinished();
					break;
				default:
					System.err
							.println(Messages
									.getInstance()
									.getString(
											"InstanceTable_InstanceProduced_InstanceEventDEFAULT_Error_Text"));
					break;
				}
			} catch (Exception ex) {
				System.err.println(ex.getMessage());
			}
		} else {
			System.err.println(Messages.getInstance().getString(
					"InstanceTable_InstanceProduced_Error_Text"));
		}
	}
}